Subcritical contact processes seen from a typical infected site
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1. | Title | Title of document | Subcritical contact processes seen from a typical infected site |
2. | Creator | Author's name, affiliation, country | Anja Sturm; University of Göttingen; Germany |
2. | Creator | Author's name, affiliation, country | Jan M. Swart; Institute of Information Theory and Automation of the ASCR; Czech Republic |
3. | Subject | Discipline(s) | |
3. | Subject | Keyword(s) | Contact process, exponential growth rate, eigenmeasure, Campbell law, Palm law, quasi-invariant law. |
3. | Subject | Subject classification | Primary: 82C22 Secondary: 60K35, 82B43. |
4. | Description | Abstract | What is the long-time behavior of the law of a contact process started with a single infected site, distributed according to counting measure on the lattice? This question is related to the configuration as seen from a typical infected site and gives rise to the definition of so-called eigenmeasures, which are possibly infinite measures on the set of nonempty configurations that are preserved under the dynamics up to a time-dependent exponential factor. In this paper, we study eigenmeasures of contact processes on general countable groups in the subcritical regime. We prove that in this regime, the process has a unique spatially homogeneous eigenmeasure. As an application, we show that the law of the process as seen from a typical infected site, chosen according to a Campbell law, converges to a long-time limit. We also show that the exponential decay rate of the expected number of infected sites is continuously differentiable and strictly increasing as a function of the recovery rate, and we give a formula for the derivative in terms of the long time limit law of the process as seen from a typical infected site. |
5. | Publisher | Organizing agency, location | |
6. | Contributor | Sponsor(s) | Work sponsored by GAČR grants 201/09/1931 and P201/12/2613. |
7. | Date | (YYYY-MM-DD) | 2014-06-23 |
8. | Type | Status & genre | Peer-reviewed Article |
8. | Type | Type | |
9. | Format | File format | |
10. | Identifier | Uniform Resource Identifier | http://ejp.ejpecp.org/article/view/2904 |
10. | Identifier | Digital Object Identifier | 10.1214/EJP.v19-2904 |
11. | Source | Journal/conference title; vol., no. (year) | Electronic Journal of Probability; Vol 19 |
12. | Language | English=en | en |
14. | Coverage | Geo-spatial location, chronological period, research sample (gender, age, etc.) | |
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